package DailyQuestions;
//有假币
import java.util.Scanner;

public class Day29_YouJiaBi {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()){
            int n = sc.nextInt();
            if(n == 0) break;
            int count = 0;
            while(n >= 2){
                n = (int) Math.ceil((double)n/3);
                count++;

            }
            System.out.println(count);
        }
    }
}
